I've been trying to follow your recommended configurations for performance when setting up my ES cluster, by setting both the variable ES_HEAP_SIZE to half my available ram on a dedicated machine, and additionally, setting bootstrap.mlockall to true in the yml configuration file. However, running:
shows that mlockall is still false on all nodes.
From looking at other posts on this topic, I can see that I can probably fix the mlockall value by granting the elasticsearch user running ES memlock unlimited, however my question is this: if I have set the variable ES_HEAP_SIZE, do I still need to set mlockall to true?? Would I likely get performance increases from that, or are they simply different methods for acheiving the same goal of guaranteeing elasticsearch a set amount of memory??